[PATCHv2 01/36] dm: spi: Convert Freescale ESPI driver to driver model
Jagan Teki
jagan at amarulasolutions.com
Wed Jun 3 09:41:03 CEST 2020
On Wed, Jun 3, 2020 at 7:33 AM Z.q. Hou <zhiqiang.hou at nxp.com> wrote:
>
> Hi Jagan,
>
> Thanks a lot for your comments!
>
> > -----Original Message-----
> > From: Jagan Teki <jagan at amarulasolutions.com>
> > Sent: 2020年6月3日 3:29
> > To: Z.q. Hou <zhiqiang.hou at nxp.com>
> > Cc: U-Boot-Denx <u-boot at lists.denx.de>; Priyanka Jain
> > <priyanka.jain at nxp.com>; Shengzhou Liu <shengzhou.liu at nxp.com>; Simon
> > Glass <sjg at chromium.org>; Biwen Li <biwen.li at nxp.com>; Bin Meng
> > <bmeng.cn at gmail.com>; Jiafei Pan <jiafei.pan at nxp.com>; Chuanhua Han
> > <chuanhua.han at nxp.com>; Xiaowei Bao <xiaowei.bao at nxp.com>
> > Subject: Re: [PATCHv2 01/36] dm: spi: Convert Freescale ESPI driver to driver
> > model
> >
> > On Tue, Jun 2, 2020 at 7:10 PM Zhiqiang Hou <Zhiqiang.Hou at nxp.com>
> > wrote:
> > >
> > > From: Chuanhua Han <chuanhua.han at nxp.com>
> > >
> > > Modify the Freescale ESPI driver to support the driver model.
> > > Also resolved the following problems:
> > >
> > > ===================== WARNING ====================== This
> > board does
> > > not use CONFIG_DM_SPI. Please update the board before v2019.04 for no
> > > dm conversion and v2019.07 for partially dm converted drivers.
> > > Failure to update can lead to driver/board removal See
> > > doc/driver-model/MIGRATION.txt for more info.
> > > ====================================================
> > > ===================== WARNING ====================== This
> > board does
> > > not use CONFIG_DM_SPI_FLASH. Please update the board to use
> > > CONFIG_SPI_FLASH before the v2019.07 release.
> > > Failure to update by the deadline may result in board removal.
> > > See doc/driver-model/MIGRATION.txt for more info.
> > > ====================================================
> > >
> > > Signed-off-by: Chuanhua Han <chuanhua.han at nxp.com>
> > > Signed-off-by: Xiaowei Bao <xiaowei.bao at nxp.com>
> > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
> > > ---
> > > V2:
> > > - Rebase the patch, no change intended.
> > >
> > > drivers/spi/fsl_espi.c | 444
> > ++++++++++++++++++++--------
> > > include/dm/platform_data/fsl_espi.h | 16 +
> > > 2 files changed, 337 insertions(+), 123 deletions(-) create mode
> > > 100644 include/dm/platform_data/fsl_espi.h
> > >
> > > diff --git a/drivers/spi/fsl_espi.c b/drivers/spi/fsl_espi.c index
> > > 50d194f614..5c76fd962e 100644
> > > --- a/drivers/spi/fsl_espi.c
> > > +++ b/drivers/spi/fsl_espi.c
> > > @@ -3,7 +3,9 @@
> > > * eSPI controller driver.
> > > *
> > > * Copyright 2010-2011 Freescale Semiconductor, Inc.
> > > + * Copyright 2020 NXP
> > > * Author: Mingkai Hu (Mingkai.hu at freescale.com)
> > > + * Chuanhua Han (chuanhua.han at nxp.com)
> > > */
> > >
> > > #include <common.h>
> > > @@ -14,10 +16,16 @@
> > > #include <malloc.h>
> > > #include <spi.h>
> > > #include <asm/immap_85xx.h>
> > > +#include <dm.h>
> > > +#include <errno.h>
> > > +#include <fdtdec.h>
> > > +#include <dm/platform_data/fsl_espi.h>
> > >
> > > struct fsl_spi_slave {
> > > struct spi_slave slave;
> > > ccsr_espi_t *espi;
> > > + u32 speed_hz;
> > > + unsigned int cs;
> > > unsigned int div16;
> > > unsigned int pm;
> > > int tx_timeout;
> > > @@ -31,6 +39,9 @@ struct fsl_spi_slave { #define to_fsl_spi_slave(s)
> > > container_of(s, struct fsl_spi_slave, slave)
> > > #define US_PER_SECOND 1000000UL
> > >
> > > +/* default SCK frequency, unit: HZ */
> > > +#define FSL_ESPI_DEFAULT_SCK_FREQ 10000000
> > > +
> > > #define ESPI_MAX_CS_NUM 4
> > > #define ESPI_FIFO_WIDTH_BIT 32
> > >
> > > @@ -65,116 +76,27 @@ struct fsl_spi_slave {
> > >
> > > #define ESPI_MAX_DATA_TRANSFER_LEN 0xFFF0
> > >
> > > -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
> > > - unsigned int max_hz, unsigned int mode)
> > > -{
> > > - struct fsl_spi_slave *fsl;
> > > - sys_info_t sysinfo;
> > > - unsigned long spibrg = 0;
> > > - unsigned long spi_freq = 0;
> > > - unsigned char pm = 0;
> > > -
> > > - if (!spi_cs_is_valid(bus, cs))
> > > - return NULL;
> > > -
> > > - fsl = spi_alloc_slave(struct fsl_spi_slave, bus, cs);
> > > - if (!fsl)
> > > - return NULL;
> > > -
> > > - fsl->espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);
> > > - fsl->mode = mode;
> > > - fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
> > > -
> > > - /* Set eSPI BRG clock source */
> > > - get_sys_info(&sysinfo);
> > > - spibrg = sysinfo.freq_systembus / 2;
> > > - fsl->div16 = 0;
> > > - if ((spibrg / max_hz) > 32) {
> > > - fsl->div16 = ESPI_CSMODE_DIV16;
> > > - pm = spibrg / (max_hz * 16 * 2);
> > > - if (pm > 16) {
> > > - pm = 16;
> > > - debug("Requested speed is too low: %d
> > Hz, %ld Hz "
> > > - "is used.\n", max_hz, spibrg / (32 *
> > 16));
> > > - }
> > > - } else
> > > - pm = spibrg / (max_hz * 2);
> > > - if (pm)
> > > - pm--;
> > > - fsl->pm = pm;
> > > -
> > > - if (fsl->div16)
> > > - spi_freq = spibrg / ((pm + 1) * 2 * 16);
> > > - else
> > > - spi_freq = spibrg / ((pm + 1) * 2);
> > > -
> > > - /* set tx_timeout to 10 times of one espi FIFO entry go out */
> > > - fsl->tx_timeout = DIV_ROUND_UP((US_PER_SECOND *
> > ESPI_FIFO_WIDTH_BIT
> > > - * 10), spi_freq);
> > > -
> > > - return &fsl->slave;
> > > -}
> > > -
> > > -void spi_free_slave(struct spi_slave *slave) -{
> > > - struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > - free(fsl);
> > > -}
> > > -
> > > -int spi_claim_bus(struct spi_slave *slave)
> > > +void fsl_spi_cs_activate(struct spi_slave *slave, uint cs)
> > > {
> > > struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > ccsr_espi_t *espi = fsl->espi;
> > > - unsigned char pm = fsl->pm;
> > > - unsigned int cs = slave->cs;
> > > - unsigned int mode = fsl->mode;
> > > - unsigned int div16 = fsl->div16;
> > > - int i;
> > > -
> > > - debug("%s: bus:%i cs:%i\n", __func__, slave->bus, cs);
> > > -
> > > - /* Enable eSPI interface */
> > > - out_be32(&espi->mode, ESPI_MODE_RXTHR(3)
> > > - | ESPI_MODE_TXTHR(4) | ESPI_MODE_EN);
> > > -
> > > - out_be32(&espi->event, 0xffffffff); /* Clear all eSPI events */
> > > - out_be32(&espi->mask, 0x00000000); /* Mask all eSPI
> > interrupts */
> > > -
> > > - /* Init CS mode interface */
> > > - for (i = 0; i < ESPI_MAX_CS_NUM; i++)
> > > - out_be32(&espi->csmode[i], ESPI_CSMODE_INIT_VAL);
> > > -
> > > - out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs]) &
> > > - ~(ESPI_CSMODE_PM(0xF) | ESPI_CSMODE_DIV16
> > > - | ESPI_CSMODE_CI_INACTIVEHIGH |
> > ESPI_CSMODE_CP_BEGIN_EDGCLK
> > > - | ESPI_CSMODE_REV_MSB_FIRST |
> > ESPI_CSMODE_LEN(0xF)));
> > > -
> > > - /* Set eSPI BRG clock source */
> > > - out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
> > > - | ESPI_CSMODE_PM(pm) | div16);
> > > -
> > > - /* Set eSPI mode */
> > > - if (mode & SPI_CPHA)
> > > - out_be32(&espi->csmode[cs],
> > in_be32(&espi->csmode[cs])
> > > - | ESPI_CSMODE_CP_BEGIN_EDGCLK);
> > > - if (mode & SPI_CPOL)
> > > - out_be32(&espi->csmode[cs],
> > in_be32(&espi->csmode[cs])
> > > - | ESPI_CSMODE_CI_INACTIVEHIGH);
> > > -
> > > - /* Character bit order: msb first */
> > > - out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
> > > - | ESPI_CSMODE_REV_MSB_FIRST);
> > > -
> > > - /* Character length in bits, between 0x3~0xf, i.e. 4bits~16bits */
> > > - out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
> > > - | ESPI_CSMODE_LEN(7));
> > > + unsigned int com = 0;
> > > + size_t data_len = fsl->data_len;
> > >
> > > - return 0;
> > > + com &= ~(ESPI_COM_CS(0x3) | ESPI_COM_TRANLEN(0xFFFF));
> > > + com |= ESPI_COM_CS(cs);
> > > + com |= ESPI_COM_TRANLEN(data_len - 1);
> > > + out_be32(&espi->com, com);
> > > }
> > >
> > > -void spi_release_bus(struct spi_slave *slave)
> > > +void fsl_spi_cs_deactivate(struct spi_slave *slave)
> > > {
> > > + struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > + ccsr_espi_t *espi = fsl->espi;
> > >
> > > + /* clear the RXCNT and TXCNT */
> > > + out_be32(&espi->mode, in_be32(&espi->mode) &
> > (~ESPI_MODE_EN));
> > > + out_be32(&espi->mode, in_be32(&espi->mode) |
> > ESPI_MODE_EN);
> > > }
> > >
> > > static void fsl_espi_tx(struct fsl_spi_slave *fsl, const void *dout)
> > > @@ -207,7 +129,8 @@ static void fsl_espi_tx(struct fsl_spi_slave *fsl,
> > const void *dout)
> > > debug("***spi_xfer:...Tx timeout! event = %08x\n",
> > > event); }
> > >
> > > -static int fsl_espi_rx(struct fsl_spi_slave *fsl, void *din, unsigned
> > > int bytes)
> > > +static int fsl_espi_rx(struct fsl_spi_slave *fsl, void *din,
> > > + unsigned int bytes)
> > > {
> > > ccsr_espi_t *espi = fsl->espi;
> > > unsigned int tmpdin, rx_times; @@ -239,10 +162,17 @@ static
> > > int fsl_espi_rx(struct fsl_spi_slave *fsl, void *din, unsigned int bytes)
> > > return bytes;
> > > }
> > >
> > > -int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void
> > *data_out,
> > > - void *data_in, unsigned long flags)
> > > +void espi_release_bus(struct fsl_spi_slave *fsl)
> > > {
> > > - struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > + /* Disable the SPI hardware */
> > > + out_be32(&fsl->espi->mode,
> > > + in_be32(&fsl->espi->mode) & (~ESPI_MODE_EN)); }
> > > +
> > > +int espi_xfer(struct fsl_spi_slave *fsl, uint cs, unsigned int bitlen,
> > > + const void *data_out, void *data_in, unsigned long
> > > +flags) {
> > > + struct spi_slave *slave = &fsl->slave;
> > > ccsr_espi_t *espi = fsl->espi;
> > > unsigned int event, rx_bytes;
> > > const void *dout = NULL;
> > > @@ -261,13 +191,14 @@ int spi_xfer(struct spi_slave *slave, unsigned int
> > bitlen, const void *data_out,
> > > max_tran_len = fsl->max_transfer_length;
> > > switch (flags) {
> > > case SPI_XFER_BEGIN:
> > > - cmd_len = fsl->cmd_len = data_len;
> > > + cmd_len = data_len;
> > > + fsl->cmd_len = cmd_len;
> > > memcpy(cmd_buf, data_out, cmd_len);
> > > return 0;
> > > case 0:
> > > case SPI_XFER_END:
> > > if (bitlen == 0) {
> > > - spi_cs_deactivate(slave);
> > > + fsl_spi_cs_deactivate(slave);
> > > return 0;
> > > }
> > > buf_len = 2 * cmd_len + min(data_len,
> > > (size_t)max_tran_len); @@ -307,7 +238,7 @@ int spi_xfer(struct spi_slave
> > *slave, unsigned int bitlen, const void *data_out,
> > > num_blks = DIV_ROUND_UP(tran_len + cmd_len, 4);
> > > num_bytes = (tran_len + cmd_len) % 4;
> > > fsl->data_len = tran_len + cmd_len;
> > > - spi_cs_activate(slave);
> > > + fsl_spi_cs_activate(slave, cs);
> > >
> > > /* Clear all eSPI events */
> > > out_be32(&espi->event , 0xffffffff); @@ -350,37
> > > +281,304 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const
> > void *data_out,
> > > *(int *)buffer += tran_len;
> > > }
> > > }
> > > - spi_cs_deactivate(slave);
> > > + fsl_spi_cs_deactivate(slave);
> > > }
> > >
> > > free(buffer);
> > > return 0;
> > > }
> > >
> > > +void espi_claim_bus(struct fsl_spi_slave *fsl, unsigned int cs) {
> > > + ccsr_espi_t *espi = fsl->espi;
> > > + unsigned char pm = fsl->pm;
> > > + unsigned int mode = fsl->mode;
> > > + unsigned int div16 = fsl->div16;
> > > + int i;
> > > +
> > > + /* Enable eSPI interface */
> > > + out_be32(&espi->mode, ESPI_MODE_RXTHR(3)
> > > + | ESPI_MODE_TXTHR(4) | ESPI_MODE_EN);
> > > +
> > > + out_be32(&espi->event, 0xffffffff); /* Clear all eSPI events */
> > > + out_be32(&espi->mask, 0x00000000); /* Mask all eSPI
> > > + interrupts */
> > > +
> > > + /* Init CS mode interface */
> > > + for (i = 0; i < ESPI_MAX_CS_NUM; i++)
> > > + out_be32(&espi->csmode[i],
> > ESPI_CSMODE_INIT_VAL);
> > > +
> > > + out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs]) &
> > > + ~(ESPI_CSMODE_PM(0xF) | ESPI_CSMODE_DIV16
> > > + | ESPI_CSMODE_CI_INACTIVEHIGH |
> > ESPI_CSMODE_CP_BEGIN_EDGCLK
> > > + | ESPI_CSMODE_REV_MSB_FIRST |
> > ESPI_CSMODE_LEN(0xF)));
> > > +
> > > + /* Set eSPI BRG clock source */
> > > + out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
> > > + | ESPI_CSMODE_PM(pm) | div16);
> > > +
> > > + /* Set eSPI mode */
> > > + if (mode & SPI_CPHA)
> > > + out_be32(&espi->csmode[cs],
> > in_be32(&espi->csmode[cs])
> > > + | ESPI_CSMODE_CP_BEGIN_EDGCLK);
> > > + if (mode & SPI_CPOL)
> > > + out_be32(&espi->csmode[cs],
> > in_be32(&espi->csmode[cs])
> > > + | ESPI_CSMODE_CI_INACTIVEHIGH);
> > > +
> > > + /* Character bit order: msb first */
> > > + out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
> > > + | ESPI_CSMODE_REV_MSB_FIRST);
> > > +
> > > + /* Character length in bits, between 0x3~0xf, i.e. 4bits~16bits */
> > > + out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
> > > + | ESPI_CSMODE_LEN(7)); }
> > > +
> > > +void espi_setup_slave(struct fsl_spi_slave *fsl) {
> > > + unsigned int max_hz;
> > > + sys_info_t sysinfo;
> > > + unsigned long spibrg = 0;
> > > + unsigned long spi_freq = 0;
> > > + unsigned char pm = 0;
> > > +
> > > + max_hz = fsl->speed_hz;
> > > +
> > > + get_sys_info(&sysinfo);
> > > + spibrg = sysinfo.freq_systembus / 2;
> > > + fsl->div16 = 0;
> > > + if ((spibrg / max_hz) > 32) {
> > > + fsl->div16 = ESPI_CSMODE_DIV16;
> > > + pm = spibrg / (max_hz * 16 * 2);
> > > + if (pm > 16) {
> > > + pm = 16;
> > > + debug("max_hz is too low: %d Hz, %ld Hz is
> > used.\n",
> > > + max_hz, spibrg / (32 * 16));
> > > + }
> > > + } else {
> > > + pm = spibrg / (max_hz * 2);
> > > + }
> > > + if (pm)
> > > + pm--;
> > > + fsl->pm = pm;
> > > +
> > > + if (fsl->div16)
> > > + spi_freq = spibrg / ((pm + 1) * 2 * 16);
> > > + else
> > > + spi_freq = spibrg / ((pm + 1) * 2);
> > > +
> > > + /* set tx_timeout to 10 times of one espi FIFO entry go out */
> > > + fsl->tx_timeout = DIV_ROUND_UP((US_PER_SECOND *
> > ESPI_FIFO_WIDTH_BIT
> > > + * 10), spi_freq);/* Set eSPI BRG
> > clock
> > > +source */ }
> > > +
> > > +#if !CONFIG_IS_ENABLED(DM_SPI)
> > > int spi_cs_is_valid(unsigned int bus, unsigned int cs) {
> > > return bus == 0 && cs < ESPI_MAX_CS_NUM; }
> > >
> > > -void spi_cs_activate(struct spi_slave *slave)
> > > +struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
> > > + unsigned int max_hz, unsigned
> > int
> > > +mode) {
> > > + struct fsl_spi_slave *fsl;
> > > +
> > > + if (!spi_cs_is_valid(bus, cs))
> > > + return NULL;
> > > +
> > > + fsl = spi_alloc_slave(struct fsl_spi_slave, bus, cs);
> > > + if (!fsl)
> > > + return NULL;
> > > +
> > > + fsl->espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);
> > > + fsl->mode = mode;
> > > + fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
> > > + fsl->speed_hz = max_hz;
> > > +
> > > + espi_setup_slave(fsl);
> > > +
> > > + return &fsl->slave;
> > > +}
> > > +
> > > +void spi_free_slave(struct spi_slave *slave)
> > > {
> > > struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > - ccsr_espi_t *espi = fsl->espi;
> > > - unsigned int com = 0;
> > > - size_t data_len = fsl->data_len;
> > >
> > > - com &= ~(ESPI_COM_CS(0x3) | ESPI_COM_TRANLEN(0xFFFF));
> > > - com |= ESPI_COM_CS(slave->cs);
> > > - com |= ESPI_COM_TRANLEN(data_len - 1);
> > > - out_be32(&espi->com, com);
> > > + free(fsl);
> > > }
> > >
> > > -void spi_cs_deactivate(struct spi_slave *slave)
> > > +int spi_claim_bus(struct spi_slave *slave)
> > > {
> > > struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > - ccsr_espi_t *espi = fsl->espi;
> > >
> > > - /* clear the RXCNT and TXCNT */
> > > - out_be32(&espi->mode, in_be32(&espi->mode) &
> > (~ESPI_MODE_EN));
> > > - out_be32(&espi->mode, in_be32(&espi->mode) |
> > ESPI_MODE_EN);
> > > + espi_claim_bus(fsl, slave->cs);
> > > +
> > > + return 0;
> > > }
> > > +
> > > +void spi_release_bus(struct spi_slave *slave) {
> > > + struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
> > > +
> > > + espi_release_bus(fsl);
> > > +}
> > > +
> > > +int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
> > > + void *din, unsigned long flags) {
> > > + struct fsl_spi_slave *fsl = (struct fsl_spi_slave *)slave;
> > > +
> > > + return espi_xfer(fsl, slave->cs, bitlen, dout, din, flags); }
> > > +#else static void __espi_set_speed(struct fsl_spi_slave *fsl) {
> > > + espi_setup_slave(fsl);
> > > +
> > > + /* Set eSPI BRG clock source */
> > > + out_be32(&fsl->espi->csmode[fsl->cs],
> > > + in_be32(&fsl->espi->csmode[fsl->cs])
> > > + | ESPI_CSMODE_PM(fsl->pm) | fsl->div16); }
> > > +
> > > +static void __espi_set_mode(struct fsl_spi_slave *fsl) {
> > > + /* Set eSPI mode */
> > > + if (fsl->mode & SPI_CPHA)
> > > + out_be32(&fsl->espi->csmode[fsl->cs],
> > > + in_be32(&fsl->espi->csmode[fsl->cs])
> > > + |
> > ESPI_CSMODE_CP_BEGIN_EDGCLK);
> > > + if (fsl->mode & SPI_CPOL)
> > > + out_be32(&fsl->espi->csmode[fsl->cs],
> > > + in_be32(&fsl->espi->csmode[fsl->cs])
> > > + |
> > ESPI_CSMODE_CI_INACTIVEHIGH); }
> > > +
> > > +static int fsl_espi_claim_bus(struct udevice *dev) {
> > > + struct udevice *bus = dev->parent;
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + espi_claim_bus(fsl, fsl->cs);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int fsl_espi_release_bus(struct udevice *dev) {
> > > + struct udevice *bus = dev->parent;
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + espi_release_bus(fsl);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int fsl_espi_xfer(struct udevice *dev, unsigned int bitlen,
> > > + const void *dout, void *din, unsigned long
> > > +flags) {
> > > + struct udevice *bus = dev->parent;
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + return espi_xfer(fsl, fsl->cs, bitlen, dout, din, flags); }
> > > +
> > > +static int fsl_espi_set_speed(struct udevice *bus, uint speed) {
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + debug("%s speed %u\n", __func__, speed);
> > > + fsl->speed_hz = speed;
> > > +
> > > + __espi_set_speed(fsl);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int fsl_espi_set_mode(struct udevice *bus, uint mode) {
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + debug("%s mode %u\n", __func__, mode);
> > > + fsl->mode = mode;
> > > +
> > > + __espi_set_mode(fsl);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int fsl_espi_child_pre_probe(struct udevice *dev) {
> > > + struct dm_spi_slave_platdata *slave_plat =
> > dev_get_parent_platdata(dev);
> > > + struct udevice *bus = dev->parent;
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + debug("%s cs %u\n", __func__, slave_plat->cs);
> > > + fsl->cs = slave_plat->cs;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int fsl_espi_probe(struct udevice *bus) {
> > > + struct fsl_espi_platdata *plat = dev_get_platdata(bus);
> > > + struct fsl_spi_slave *fsl = dev_get_priv(bus);
> > > +
> > > + fsl->espi = (ccsr_espi_t *)((u32)plat->regs_addr);
> > > + fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
> > > + fsl->speed_hz = plat->speed_hz;
> > > +
> > > + debug("%s probe done, bus-num %d.\n", bus->name, bus->seq);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static const struct dm_spi_ops fsl_espi_ops = {
> > > + .claim_bus = fsl_espi_claim_bus,
> > > + .release_bus = fsl_espi_release_bus,
> > > + .xfer = fsl_espi_xfer,
> > > + .set_speed = fsl_espi_set_speed,
> > > + .set_mode = fsl_espi_set_mode,
> > > +};
> > > +
> > > +#if CONFIG_IS_ENABLED(OF_CONTROL)
> > && !CONFIG_IS_ENABLED(OF_PLATDATA)
> > > +static int fsl_espi_ofdata_to_platdata(struct udevice *bus) {
> > > + fdt_addr_t addr;
> > > + struct fsl_espi_platdata *plat = bus->platdata;
> > > + const void *blob = gd->fdt_blob;
> > > + int node = dev_of_offset(bus);
> > > +
> > > + addr = dev_read_addr(bus);
> > > + if (addr == FDT_ADDR_T_NONE)
> > > + return -EINVAL;
> > > +
> > > + plat->regs_addr = lower_32_bits(addr);
> > > + plat->speed_hz = fdtdec_get_int(blob, node,
> > "spi-max-frequency",
> > > +
> > FSL_ESPI_DEFAULT_SCK_FREQ);
> > > +
> > > + debug("ESPI: regs=%p, max-frequency=%d\n",
> > > + &plat->regs_addr, plat->speed_hz);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static const struct udevice_id fsl_espi_ids[] = {
> > > + { .compatible = "fsl,mpc8536-espi" },
> > > + { }
> > > +};
> > > +#endif
> > > +
> > > +U_BOOT_DRIVER(fsl_espi) = {
> > > + .name = "fsl_espi",
> > > + .id = UCLASS_SPI,
> > > +#if CONFIG_IS_ENABLED(OF_CONTROL)
> > && !CONFIG_IS_ENABLED(OF_PLATDATA)
> > > + .of_match = fsl_espi_ids,
> > > + .ofdata_to_platdata = fsl_espi_ofdata_to_platdata, #endif
> > > + .ops = &fsl_espi_ops,
> > > + .platdata_auto_alloc_size = sizeof(struct fsl_espi_platdata),
> > > + .priv_auto_alloc_size = sizeof(struct fsl_spi_slave),
> > > + .probe = fsl_espi_probe,
> > > + .child_pre_probe = fsl_espi_child_pre_probe, }; #endif
> >
> > It still has nondm code, does it required for SPL due to foot-print restrictions?
> > How much are the numbers please?
>
> As the SPL is non-DM on these platforms, the SPL of SPI flash boot still needs these non-DM code.
> What does the 'foot-print restrictions' mean? I don't know the background, since I just take over this task.
foot-print here mean size of the binary. what if the driver has only
DM code with DM_SPI_FLASH?
Jagan.
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